--Manage the AI nodes used by DEFCON.
local bmp = require 'map.bmp'
local lg = assert( love.graphics )
local locationQuery = require 'map.locationQuery'

local t = setmetatable( {}, {__index = locationQuery } )
local print = print

local aiNode = {}
local mtAiNode = { __index = aiNode }

function aiNode:formatDisplayInfo()
  return ([[AI NODE: %d
    LONGITUDE: %3.2f
    LATITUDE: %3.2f
    ATTACKING: %s
    ]]):format( self.idx, self.x, self.y, tostring(self.attacking) )
end

function t.load( filename )
  local img, imgd = bmp.load( filename )
  local nodes = { 
    filename = filename,
    visible = true,
    all = {},
    att = {},
    ptsAtt = {},
    def = {},
    ptsDef = {},
    img = img,
    imgd = imgd }

  print( "=== Loading AI Markers: ===" )
  local idx = 1
  for x = 0, 511 do
    for y = 0, 284 do
      local r, g = imgd:getPixel( x, 284 - y )
      if r > 0.5 or g > 0.5 then
        local long = x * (360 / imgd:getWidth()) - 180
        local lat = y * (200 / img:getHeight()) - 100
        local attacking = (r > 0.5)
        local set = attacking and nodes.att or nodes.def
        local node = setmetatable( {x = long, y = lat, attacking = attacking, idx = idx}, mtAiNode )
        nodes.all[ idx ] = node
        set[#set + 1] = node
        idx = idx + 1
      end
    end
  end

  do
    local k = 1
    for i, point in ipairs( nodes.att ) do
      nodes.ptsAtt[k], nodes.ptsAtt[k + 1] = point.x, point.y
      k = k + 2
    end

    k = 1
    for j, point in ipairs( nodes.def ) do
      nodes.ptsDef[k], nodes.ptsDef[k + 1] = point.x, point.y
      k = k + 2
    end
  end
  
  nodes.all = locationQuery.New( nodes.all )
  setmetatable( nodes, {__index = t } )
  return nodes
end

function t.selectNearest( nodes, x, y )
  return (nodes.all):getClosestPoint( x, y )
end

function t.draw( nodes )
  lg.setColor( 1, 0, 0, 0.5 )  
  lg.points( nodes.ptsAtt )
  lg.setColor( 0, 1, 0, 0.5 )
  lg.points( nodes.ptsDef )
end

function t.save( nodes )
  return bmp.ai( nodes.all )
end

return t